Elizabeth was born in 1879. She passed away in 1927.
Sources
"England and Wales Birth Registration Index, 1837-2008," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:2XFF-7DD : 1 October 2014), Elizabeth Mary Gathamd, 1879; from "England & Wales Births, 1837-2006," database, findmypast (http://www.findmypast.com : 2012); citing Birth Registration, Hertford, Hertfordshire, England, citing General Register Office, Southport, England.
"England and Wales Census, 1881," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:Q27Z-LPWJ : 13 December 2017), Eliza M Gathard in household of Thos Gathard, Bengeo, Hertfordshire, England; from "1881 England, Scotland and Wales Census," database and images, findmypast (http://www.findmypast.com : n.d.); citing p. 68, Piece/Folio 1423/100, The National Archives, Kew, Surrey; FHL microfilm 101,774,598.
"England and Wales Census, 1891," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:W8ZZ-XN2 : 10 December 2017), Elizabeth Gathard in household of Thomas Gathard, Hatfield, Hertfordshire, England; from "1891 England, Scotland and Wales census," database and images, findmypast (http://www.findmypast.com : n.d.); citing PRO RG 12, Hertfordshire county, subdistrict, The National Archives of the UK, Kew, Surrey.
"England and Wales Census, 1901," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:XS4Z-792 : 8 April 2016), Elizabeth Garhard in household of Thomas Garhard, Hatfield, Hertfordshire, England; from "1901 England, Scotland and Wales census," database and images, findmypast (http://www.findmypast.com : n.d.); citing Hatfield subdistrict, PRO RG 13, The National Archives, Kew, Surrey.
"England and Wales Marriage Registration Index, 1837-2005," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:26QC-7C3 : 22 May 2014), Elizabeth Mary Gathard, 1903; from “England & Wales Marriages, 1837-2005,” database, findmypast (http://www.findmypast.com : 2012); citing 1903, quarter 4, vol. 3A, p. 1133, Hatfield, Hertfordshire, England, General Register Office, Southport, England.
"England and Wales Census, 1911," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:XW5J-GVT : 1 August 2017), Elizabeth Garham in household of Charles Garham, Wandsworth Borough, , London, England; from "1911 England and Wales census," database and images, findmypast (http://www.findmypast.com : n.d.); citing PRO RG 14, The National Archives of the UK, Kew, Surrey.
"England and Wales Death Registration Index 1837-2007," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:QVHZ-Y2QL : 4 September 2014), Elizabeth M Yarham, 1927; from "England & Wales Deaths, 1837-2006," database, findmypast (http://www.findmypast.com : 2012); citing Death, Wandsworth, London, England, General Register Office, Southport, England.